bitly currently limits API users to no more than five concurrent connections from a single IP address. Also, bitly institutes per-hour, per-minute, per-user, and per-IP rate limits for each API method.
While rate limits exist, default limits are more than sufficient for most API usage.
Please note that our API rate limits reset once each hour. If you are experiencing rate limiting errors, please wait 60 minutes to resume making API calls.
To avoid common causes of rate limiting issues, please read our Best Practices.
If you're a high-volume user of the bitly API, please contact us at firstname.lastname@example.org to discuss your options.
When contacting bitly support include a description of how you are using the bitly API, which API endpoints you are using, an estimate of current request volumes for a 24 hour period, and your bitly login.